In addition to ABO and Rh, there are 48 other recognised blood types called blood group systems. This was mentioned in a talk by Prof Robert Flower from the Australian Red Cross Lifeblood in a research by his PhD student, Dr Rachel Githiomi from KNBTS. 
 

The two had visited the department to present their findings and partner with the department in forming a national reference laboratory for blood group and genotyping. The research discovered there are more blood group systems among Kenyan that are not recognized.